All conversion runs in your browser. Nothing is uploaded.
About this converter
YAML is often preferred for configuration files (Kubernetes, GitHub Actions, Ansible) because it's human-readable and supports comments, while JSON dominates as the data-exchange format for APIs. This converter takes any valid JSON document and emits the equivalent YAML representation with consistent indentation and quoting — all inside your browser.
Features
- Strict JSON parsing with line-accurate error reporting
- Idiomatic YAML output (2-space indent, sensible quoting)
- Preserves arrays, nested objects, booleans, null and unicode
- Copy or download the YAML result with one click
- No upload — your JSON stays on your device
How to use
- Paste your JSON into the left panel.
- Read the converted YAML on the right — updated as you type.
- Click Copy or Download to export the result.
Frequently Asked Questions
Does this support nested JSON structures?
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Yes. Arbitrarily nested objects and arrays are emitted as nested YAML mappings and sequences with correct indentation.
Will JSON comments be preserved?
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JSON itself does not allow comments, so there are none to preserve. If your input contains `//` or `/* */` comments it is not valid JSON and will fail to parse.
How are booleans, null and numbers handled?
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JSON `true` / `false` / `null` map to YAML `true` / `false` / `null`. Integers and floats are emitted as plain scalars; very long numbers stay numeric and do not get quoted.
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Canonical: https://devformatlab.com/en/convert/json-to-yaml